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Response Functions<br />
„brute force method“:<br />
1. synthesis of Stokes spectrum in<br />
given model atmosphere<br />
2. perturbation of one atm.<br />
parameter<br />
3. synthesis of „perturbed“ Stokes<br />
spectrum<br />
4. calculation of ratio between<br />
both spectra<br />
5. repeat (2)-(4) (2) (4) for all τ τi, i, λ λi,atm. i, atm.<br />
parameter, atm. comp.<br />
The smart way:<br />
� knowledge of source function,<br />
evolution operator and<br />
propagation matrix<br />
� direct computation of RFs<br />
possible (all parameters known<br />
from solution of RTE RTE, simple<br />
derivatives)<br />
A. Lagg - Abisko Winter School 12
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